ffmpeg -i input.mkv -map 0:1 -c:a copy dialogue.aac
Here’s a for working with Superman & Lois S04E02 (assuming you have a source file, e.g., superman_and_lois_s04e02.mkv ). superman & lois s04e02 ffmpeg
A useful command for archiving this episode with high fidelity (using H.265 for efficiency) would be: ffmpeg -i input